A rapid prediction method for geological disaster risk of water-rich and weak surrounding rock tunnels

A technology for geological disasters and weak surrounding rocks. It is applied in the direction of earth drilling, mining equipment, mining equipment, etc. It can solve the problems of different inference conclusions and large errors, so as to reduce the dependence on experience and ensure normal construction. The effect of simple method

Active Publication Date: 2022-04-12
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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Problems solved by technology

However, since the detection results of the advanced geological forecast are qualitative conclusions, on-site managers can only rely on their own work experience to infer the geological hazards in front of the tunnel face according to the results of the advanced geological forecast. The conclusions vary from person to person, and the error is large

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  • A rapid prediction method for geological disaster risk of water-rich and weak surrounding rock tunnels
  • A rapid prediction method for geological disaster risk of water-rich and weak surrounding rock tunnels
  • A rapid prediction method for geological disaster risk of water-rich and weak surrounding rock tunnels

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] . Step 1. Combining the types of geological hazards and the degree of damage that occur during the construction of tunnels with rich water and weak surrounding rocks, determine the types of geological hazards and the division of risk levels for tunnels with rich water and weak surrounding rocks.

[0031] The geological hazards of the above-mentioned tunnels with rich water and soft surrounding rocks are mainly three types: large deformation, outburst, and collapse. The risk level of each geological hazard type is determined by the method of thirds and divided into three categories: low, medium, and high. The details are shown in the following table:

[0032] Types of geological hazards Geological Hazard Risk Level large deformation High risk of large deformation, medium risk of large deformation, low risk of large de...

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Abstract

The invention discloses a method for rapidly predicting the risk of geological disasters in tunnels with rich water and weak surrounding rocks, as follows: Step 1: Combining the types of geological disasters and their degree of harm that occur during the construction of tunnels with rich water and weak surrounding rocks, determine the rich water and weak surrounding rocks Classification of geological hazard types and risk levels of surrounding rock tunnels; Step 2: Determine the types of geological hazards and risk levels of the tunnel face according to the conclusions of the geological sketch and monitoring data; Step 3: Based on the geological conditions of the tunnel face, according to Based on the results of the advanced geological forecast, determine the grade of the geological conditions of the tunnel's advanced geological forecast detection section; step 4, based on the geological conditions of the tunnel face and the risk level of geological disasters, based on the product scaling method, the tunnel's advanced geological forecast The geological condition level of the detection section is converted into its geological hazard risk level. The method is simple and fast, and can provide a more accurate decision-making basis for the rapid construction of water-rich and weak surrounding rock tunnels.

Description

【Technical field】 [0001] The invention belongs to the technical field of tunnel engineering safety evaluation, and in particular relates to a rapid prediction method for geological disaster risks of tunnels with rich water and weak surrounding rocks. 【Background technique】 [0002] Due to the active tectonic movement and complex geological conditions in the mountainous areas of western my country, the surrounding rock is weak and multi-layered, and the groundwater is developed, resulting in frequent natural disasters such as large deformation of the surrounding rock, surges, and collapses during tunnel construction, which seriously threaten the lives of construction personnel on site. Property safety seriously affects the normal development of on-site construction operations. [0003] In view of natural disasters such as large deformation of the surrounding rock, surge, and collapse during tunnel construction, advanced geological prediction technology has been applied and pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/18E21F17/00
CPCE21F17/18E21F17/00E21F17/185
Inventor 代昱昊田洪义王华刘永胜彭桂彬代云峰李永志曹贵才刘润华肖正
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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